4wd Drag Radial Tire Pressures?

Getting tired of the high 1.6 sixty foots the Proxes ST II's are giving me, lol. Ordered some 325/45R18 Hoosier Drag Radials. They should be here Wednesday. For those of you with the same or a similar tire, what kind of pressure are you running in them and what kind of sixty foot are you netting?

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I run 20-22 Front and 15-18 In Rear

20 to 24 depending on the track.